@article{fdi:010084911, title = {{S}patial and seasonal dynamics of total suspended sediment and organic carbon species in the {C}ongo {R}iver - art. no. {GB}4019}, author = {{C}oynel, {A}. and {S}eyler, {P}atrick and {E}tcheber, {H}. and {M}eybeck, {M}. and {O}range, {D}idier}, editor = {}, language = {{ENG}}, abstract = {[1] {T}he {C}ongo ( {Z}aire) {R}iver, the world's second largest river in terms both of water discharges and of drainage area after the {A}mazon {R}iver, has remained to date in a near-pristine state. {F}or a period between 2 and 6 years, the mainstream near the river mouth ({B}razzaville/{K}inshasa station) and some of the major and minor tributaries ( the {O}ubangui, {M}poko, and {N}goko-{S}angha) were monitored every month for total suspended sediment ({TSS}), particulate organic carbon ({POC}), and dissolved organic carbon ({DOC}). {I}n this large but relatively flat equatorial basin, {TSS} levels are very low and organic carbon is essentially exported as {DOC}: from 74% of {TOC} for the tributaries flowing in savannah regions and 86% for those flowing in the rain forest. {T}he seasonal patterns of {TSS}, {POC}, and {DOC} show clockwise hysteresis in relation to river discharges, with maximum levels recorded 2 to 4 months before peak flows. {A}t the {K}inshasa/ {B}razzaville station, the {DOC} distribution is largely influenced by the input from the tributaries draining the large marshy forest area located in the center of the basin. {T}here is a marked difference between specific fluxes, threefold higher in the forest basins than in the savannah basins. {T}he computation of inputs to the {A}tlantic {O}cean demonstrates that the {C}ongo is responsible for 14.4 x 10(6) t/yr of {TOC} of which 12.4 x 10(6) t/yr is {DOC} and 2 x 10(6) t/yr is {POC}. {T}he three biggest tropical rivers ( the {A}mazon, the {C}ongo, and the {O}rinoco), with only 10% of the exoreic world area drained to world oceans, contribute similar to 4% of its {TSS} inputs but 15 - 18% of its organic carbon inputs. {T}hese proportions may double when considering only world rivers discharging into the open ocean.}, keywords = {{CONGO} ; {ZAIRE} ; {CONGO} {COURS} {D}'{EAU}}, booktitle = {}, journal = {{G}lobal {B}iogeochemical {C}ycles}, volume = {19}, numero = {4}, pages = {17}, ISSN = {0886-6236}, year = {2005}, DOI = {10.1029/2004{GB}002335}, URL = {https://www.documentation.ird.fr/hor/fdi:010084911}, }